Fly geyser would be a great excursion if you can make the connection with the people who are in contact with the owners. The geyser is on private property and not natural, however the colors of the algi colonies are amazing! It is northeast of Gerlach. The Blackrock Desert is the site of the Burning Man Gathering that is held each year. A stop off at Pyramid Lake provides a nice break for the drive.
I highly recommend Bodie State Historic Park, if you can get there!